<template>
 <div>
 <!-- 面包屑导航区域 -->
  <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
 <!-- 卡片视图 -->
 <el-card>
    <!-- 添加角色按钮区域 -->
    <el-row>
        <el-col>
            <el-button type="primary" @click="addRolesDialogVisible =true" >添加角色</el-button>
        </el-col>
    </el-row>
    <!-- 角色列表区域 -->
    <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
            <template slot-scope="scope">
                <el-row  :class="['bdbottom',i1===0 ? 'bdtop':'','vcenter']"  v-for="(item1 ,i1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                        <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二级权限和三级权限 -->
                    <el-col :span="19">
                    <!-- 通过for循环嵌套渲染二级权限 -->
                        <el-row :class="[i2 ===0 ? '': 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                            <el-col :span="6">
                                <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="18">
                                <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id"
                                closable @close="removeRightById(scope.row,item3.id)">
                                    {{item3.authName}}
                                </el-tag>
                            </el-col>
                        </el-row>
                    </el-col>
                </el-row>
            </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="序号"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditRolesDialog(scope.row.id)">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
                <el-button size="mini" type="warning" icon="el-icon-setting"
                @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
        </el-table-column>
    </el-table>
 </el-card>

 <!-- 添加角色对话框 -->
 <el-dialog
  title="添加角色"
  :visible.sync="addRolesDialogVisible"
  width="45%" @close="addRolesDialogClosed">
  <!-- 内容主体区域 -->
  <el-form :model="addRolesForm" :rules="addRolesFormRules" ref="addRolesFormRef" 
  label-width="80px">
    <el-form-item label="角色名称" prop="roleName">
        <el-input v-model="addRolesForm.roleName"></el-input>
    </el-form-item>
    <el-form-item label="角色描述" prop="roleDesc">
        <el-input v-model="addRolesForm.roleDesc"></el-input>
    </el-form-item>
  </el-form>
  <!-- 底部区域 -->
  <span slot="footer" class="dialog-footer">
    <el-button @click="addRolesDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addRoles">确 定</el-button>
  </span>
 </el-dialog>
 <!-- 修改用户的对话框 -->
 <el-dialog
  title="修改角色"
  :visible.sync="editRolesDialogVisible"
  width="45%" @close="editRolesDialogClosed">
  <el-form :model="editRolesForm" :rules="editRolesFormRules" ref="editRolesFormRef" label-width="80px">
    <el-form-item label="角色名称" prop="roleName">
        <el-input v-model="editRolesForm.roleName" ></el-input>
    </el-form-item>

    <el-form-item label="角色描述" prop="roleDesc">
        <el-input v-model="editRolesForm.roleDesc" ></el-input>
    </el-form-item>
  </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="editRolesDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editRolesInfo">确 定</el-button>
  </span>
</el-dialog>
<!-- 分配权限的对话框 -->
<el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="45%" @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treeProps" 
  show-checkbox node-key="id"
  default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
 </div>
</template>
<script>
import RightsVue from './Rights.vue'
 export default {
     data(){
         return {
             rolelist:[],
             //添加角色对话框的显示与隐藏
             addRolesDialogVisible:false,
             //添加角色的表单数据
             addRolesForm:{
                roleName:'',
                roleDesc:''
             },
             //添加角色的验证规则对象
             addRolesFormRules:{
                roleName:[
                    {required: true,message:'请输入角色名',trigger:'blur'},
                    {min:3,max:20,message:'角色名长度在3~20个字符之间',trigger:'blur'}
                ],

                roleDesc:[
                    {message:'请输入角色描述',trigger:'blur'},
                    {max:30,message:'角色描述在不超过30个字符',trigger:'blur'}
                ]
             },
             //控制修改角色对话框的显示与隐藏
             editRolesDialogVisible:false,
             //查询到的角色信息对象
             editRolesForm:{},
             //修改角色的验证规则对象
             editRolesFormRules:{
                 roleName:[
                    {required: true,message:'请输入角色名',trigger:'blur'},
                    {min:3,max:20,message:'角色名长度在3~20个字符之间',trigger:'blur'}
                ],
                 roleDesc:[
                    {message:'请输入角色描述',trigger:'blur'},
                    {max:30,message:'角色描述在不超过30个字符',trigger:'blur'}
                ]

             },
             //控制分配权限对话框的显示与隐藏
             setRightDialogVisible:false,
             //所有权限的数据
             rightslist:[],
             //树型控件的属性绑定对象
             treeProps:{
                 label:'authName',
                 children:'children'
             },
             //默认选中的节点id值数组
             defKeys:[],
             //当前即将分配权限的角色id
             roleId:''

         }
     },
     created(){
         this.getRolesList()
     },
     methods:{
        async getRolesList(){
           const{data:res}= await this.$http.get('roles')
           if(res.meta.status !==200){
               return  this.$message.error('获取角色列表失败')
           }
           this.rolelist=res.data
         },
         //监听添加角色对话框的关闭事件
         addRolesDialogClosed(){
             this.$refs.addRolesFormRef.resetFields()
         },
         //点击确定按钮，添加新角色
         addRoles(){
             this.$refs.addRolesFormRef.validate(async valid=>{
                 if(!valid) return
                 //可以发起添加角色的网络请求
                const {data:res}=await this.$http.post('roles',this.addRolesForm)
                if(res.meta.status!==201) {
                    this.$message.error('添加角色失败！')
                }
                 this.$message.success('添加角色成功！')

                 this.addRolesDialogVisible =false
                 this.getRolesList()

             })
         },
         //显示编辑角色的对话框
         async showEditRolesDialog(id){
            const {data:res}=await this.$http.get('roles/'+id)
             if(res.meta.status!==200) {
                  return this.$message.error('查询角色信息失败！')
                }
                this.editRolesForm=res.data
             this.editRolesDialogVisible =true
         },
         //监听修改用户对话框的关闭事件
         editRolesDialogClosed(){
             this.$refs.editRolesFormRef.resetFields()
         },
         //修改角色信息并提交
         editRolesInfo(){
             this.$refs.editRolesFormRef.validate(async valid=>{
                if(!valid) return
                 //发起修改角色信息的请求
                const {data:res}=await this.$http.put('roles/'+this.editRolesForm.roleId,
                {
                    roleName:this.editRolesForm.roleName,
                    roleDesc:this.editRolesForm.roleDesc
                })
                if(res.meta.status!==200){
                    return  this.$message.error('更新角色信息失败！')
                }
                //关闭对话框
                this.editRolesDialogVisible=false
                //刷新数据列表
                this.getRolesList()
                //提示修改成功
                this.$message.success('更新角色信息成功！')
             })
         },
         //根据id删除对应的角色
        async removeRoleById(id){
             //弹框询问是否删除数据
              const confirmResult =await this.$confirm('此操作将永久删除该角色, 是否继续?', 
                '提示', 
                {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }
            ).catch(err=>err)
            //用户确认删除，返回值未字符串confirm
            //用户取消删除，返回字符串cancel
            if(confirmResult!=='confirm'){
                return this.$message.info('已取消删除')
            }
            const {data:res} = await this.$http.delete('roles/' +id)
            if(res.meta.status !==200){
                return this.$message.error('删除用户失败！')
            }
            this.$message.success('删除用户成功！')
            this.getRolesList()
        },
        //通过id删除对应的权限
        async removeRightById(role,rightId){
            //弹框
              const confirmResult =await this.$confirm('此操作将永久删除该权限, 是否继续?', 
                '提示', 
                {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }
            ).catch(err=>err)
            //用户确认删除，返回值未字符串confirm
            //用户取消删除，返回字符串cancel
            if(confirmResult!=='confirm'){
                return this.$message.info('已取消删除')
            }
            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status !==200){
                return this.$message.error('删除权限失败！')
            }
            role.children = res.data
            

        },
        //展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId =role.id
           const {data:res}=await this.$http.get('rights/tree')
           if(res.meta.status!==200){
               return  this.$message.error('获取权限数据失败')
           }
           //获取到的权限数据保存到data中
           this.rightslist=res.data
           //递归获取三级节点的id
           this.getLeafKeys(role,this.defKeys)
           this.setRightDialogVisible=true
        },
        //通过递归方式获取所有三级权限的id，并保存到defKeys中
        getLeafKeys(node , arr){
            //如果当前node节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>{
                this.getLeafKeys(item,arr)
        })
        },
        //监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys=[]
        },
        //点击确定为角色分配权限
        async allotRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')

            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

            if(res.meta.status!==200){
                return  this.$message.error('分配权限失败！')
            }
             this.$message.success('分配权限成功！')
             this.getRolesList()
             this.setRightDialogVisible=false
        }
     }
 }
 </script>

<style lang="less" scoped>
.el-tag{
    margin:7px;
}

.bdtop{
    border-top: 1px solid #eee;
}

.bdbottom{
    border-bottom:1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>
